Paper-bag machine.



N0. 644,80. Patented Feb. 27, I900. J. W. DUVALL & G. A. SHEPARD.

PAPER BAG MACHINE.

(Application filed m 29, 1899.)

' 2 SheetsSheet I.

(No Model.)

I I W W 0 MW J Inventor s Attorney Witnesses:

N0. 644,13O Patented Feb. 27,1900. .1. w. DUVALL & s. A. SHEPARD.

,PAPER BAG MACHINE. (Application filed July 29, 1899.)

2 Sheets-Sheet 2,

(No Model.

Inventor h M w- Attorney v UNITED STATES- PATENT Fries.

JAMES W. DUVALL AND GEORGE A. SHEPARD, OF MIDDLETOWVN, OI'IIO,ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THEMSELVES AND XVILLIAMG. CLARK, OF SAME PLACE;

PAPER-BAG MACHINE.

SPECIFICATION forming part Of Letters Patel 1t No. 644,130, datedFebruary 27, 1906. Application filed July 29, 1899. SerialNo. 725,469.(No model.)

To azz whom it may concern:

Be it known that we, JAMES W. DUVALL and GEORGE A.SHEPARD, ofMiddletown, Butler county, Ohio, have invented certain new and usefulImprovements in Paper-Bag a; ehines, of which the following is aspecificaion.

This invention, pertaining to paper-bag machines, has reference to thatportion of the machinery dealing with a bellows folded paper tube andserving to form the diamond fold in the bottom of the bag-sections ofthe tube and leave the bottom in condition to have paste applied andthen have its flaps folded to complete the bottom.

Our machine operates upon connected blank-sections and it consists of aroll having a pair of side grippers and a flap-holder, a cylinderrunning in connection with and having a diameter in multiple of that ofthe roll, a multiplicity of pairs of side grippers carried by saidcylinder, means for operating the grippers carried by the roll, meansfor operating the grippers carried by the cylinder and holding saidgrippers in engagement with the blank until after the succeeding pair ofgrippers has engaged the next blank-section, and mechanism for turningsaid roll and cylinder continuously forward. This construction enablesus to pass the connected bag-sections between the roll and cylinder,which act as their own feeders, and to discharge the same in a string ofbag-sections, with diamond folds produced in each section.

Our invention will be readily understood from the following description,taken in connection with the accompanying drawings, in which- Figure 1is a side elevation of a machine exemplifying our invention; Fig. 2, aplan of the same; Fig. 3, an enlarged side elevation of the coactingportions of the roller and cylinder, certain fixed cams appearing invertical section in the plane of line a of Figs. 2 and 4; Fig. 4,.a planof one of the grippers; Fig. 5, a plan of an illustrative bellows-foldedtube, showing the bag in various stages of progress, the seamed side ofthe tube being uppermost; and Fig. 6, a bottom view of the same tubethatis to say, the seam being underneath.

In the drawings, and referring now only to Figs. 5 and 6, 1 indicates abellows-folded paper tube of the usual form employed in bagmaking; 2,the usual seam thereof, which seam we prefer shall be on the uppermostside of the tube as it is fed to our machine; 3, short curvedcross-slits cut through the lower ply of the tube at a distance apartrepresented by the length of each bag-section; 4, crossslits cut throughboth plies of the bellows fold, their inner extremities joining theouter extremities of curved cross-cuts 3, whereby the tube as thus farprovided with cross-cuts is completely severed in its lower ply andsevered at the upper ply, except as to that portion represented by thelength of the curved cross-cuts 3; 5, the tails which thus form theconnectionbetween the bag-sections after the cross-cuts 3 and 4 havebeen made, these tails serving as means by which the tube and thebag-sections in various steps of completion are drawn through themachine, it being understood that the tube, as represented by Figs. 5and 6, moves to the right in passing through the machine; 6, the notchesformed in the rear end of the lower ply of each bag-section by thecutting of curved crosscuts 3, these notches forming the finger-notchesin the mouths of the completed bags; 7, a portion of the tube ofbag-section length comprehended between the curved cross-cuts 3 and theset of undisturbed cross-cuts 4, this portion 7 of the tube representinga bag-section at the first stage of action of our machine; 8, a portionof the tube j ust in advance of portion 7 and representing a bagsectionin the second and final stage of action of the machine, the diamond foldhaving been formed in the bottom of the bag-section, ready for theapplication of the paste and the folding of the flaps of the diamond;9,v a portion of the tube in advance of portion 8 and rep resenting thebag-section as having had its been applied and tail 5 shall have beensevered from the completed bag-section; 12, the trailing flap of thediamond fold, ready to be folded forward and pasted to the bottom assoon as the bottom paste shall have been applied, and 13 the completedbottom of the paper bag after the flaps have been folded and pressed.

Our machine receives the bellows-folded tube provided with the curvedcross-cuts 3 and produces the cross-cuts 4 and then forms the diamondfold, thus putting the bag-section into the condition indicated byportion 8 of Figs. 5 and 6, ready for the usual operation of applyingthe bottom paste and folding the prow and trailing flaps of the bottom,the diamond fold being formedupon the given bag-section while thepreceding bag-section is still attached to it by the tail 5. The seriesof bag-sections, with the diamond fold formed at each section by theaction of our machine, may then be subjected to the action of other andusual mechanism for pasting and folding the flaps, or, if desired, suchmechanism may be added to our machine, which in its preferredconstruction has its diamond-folded bag-sections carried forward by arevolving cylinder such as is frequently employed in connection withmechanism for applying paste to and folding the flaps of diamond-foldedbag-sections.

The duty of our machine having been explained in connection with Figs. 5and 6, we will now describe the preferred construction and the mode ofoperation of the same.

Referring to the remaining figures of the drawings, 14 indicates a rollhaving a measure of circumference represented by the length of thedesired bag-section and having a length somewhat in excess of the widthof the bellowsfolded tube to be dealt with, it being understood that,looking at Figs. 1, 2, and 3, the bellows-folded tube provided withcurved cross-cuts in its lower ply comes to our machine from the leftand engages the upper and right-hand portions of the periphery of roll14; 15, fixed frame parts of the machine; 16, a pair ofgripper-spindles, one

mounted at each end of roll 14, the axes of these spindles beingparallel with each other and at right angles to the axis of roll 14; 17,a gripper-finger projecting from each of the gripper-spindles andadapted when turned inwardly toward each other to lie snugly upon theperiphery of roll 14, these fingers when thus swung inwardly lying uponthe periphery of roll 14 in angular lines, their points convergingrearwardly as the roll turns in the direction of the arrow, the angle ofconvergence being that represented by the usual breaking lines of theinner plies of the bellows at the diamond fold, as indicated by dottedlines 31 in Fig. 5, fingers 17 when swung outward out of action beingclear of the roll, as indicated in Fig. 2; 1S, ball-bearings for thegripper-spindle 16; 19, an arm projecting outwardly from eachgripper-spindle 16, substantially at right angles with its finger 17,the outer end of the arm being preferably provided with anantifriction-roll, as indicated; 20, fixed cams supported by theframework at each end of roll 14 and adapted as the roll turns forwardto be engaged by arms 19 and serve in swinging the fingers 17 inward toactive position on the periphery of roll 14; 21, a spring at each ofarms 19, serving to hold its finger 17 to outward inactive position, butto permit the finger to swing inwardly under the influence of its cam20; 22, a pair of spurs projecting from the periphery of roll 14 at suchdistance apart as to engage that portion of the lower ply of the tubewhich is cut from notch 6 and forms the foremost portion of thebag-section before the diamond is formed and the tag of the trailingflap after the diamond is formed, the spurs 22 being disposed on roller14 in advance of the finger 17 a distance appropriate to the distancebetween the part of the tube engaged by the spurs and the breakin g lineof the inner plies of the bellows folds; 23, a cross-cutting bladecarried by the periphery of 1 01114 to the rear of spurs 22 in positionto make the cross-cuts 4 illustrated in Fig. 5; 24, a fixedstripping-finger engaging a peripheral groove in roll 14 and adapted atthe proper time to strip the tag of the trailing flap from spurs 22; 25,a roll mounted in the framing and having its periphery running incontact with that of roll 14, roll 25 having three times the diameter ofroll 14 and being hereinafter termed the cylinder or carrier; 26, threepairs of grippers, similar to those described in connection with roll14, mounted on cylinder25,thepairs being equally spaced apart upon theperiphery of the cylinder, so that the peripheral distance between thepairs of grippers equals the length of the given bag-section and equalsthe circumference of roll 14, the angular relationship of the roll tothe cylinder being such that the pair of grippers on the roll willexactly match a pair of grippers on the cylinder as the four gripperspass the line of contact between the roll and the cylinder; 27, fixedcams, one at each end of the cylinder and adapted as the cylinder turnsto engage the operating-arms of the grippers on the cylinder and throwthose grippers inwardly to active position at the same instant cam 20causes gripper-fingers 17 to go into active position; 28, intermemberinggears on the shafts of the roll and the cylinder, their pitch diametersbeing equal to the diameters of the roll and cylinder, respectively; 29,a pulley on the shaft of roll 14 and serving to exemplify means by whichoperative motion is given to the parts; 30, a press-roll mounted in theframing and having its periphery running in contact with that of thecylinder some distance in advance of roll 14, and 31, Fig. 5, the dottedlines heretofore referred to as indicating the breakinglines of theinner plies of the bellows fold as lshe bottom is opened to form thediamond :old.

Referring to Fig. 3, spurs 22 cooperate with suitable clearance-holes incylinder 25, as is usual in connection with spurs provided upon one of apair of cooperating rolls, and similarly cutting-blade 23 cooperateswith suitable cross-notches in cylinder 25.

Turning to Fig. 1, the bellows-folded tube, provided with the curvedcross-cuts 3 in its lower ply, comes to the machine from the left,passing over the top of roll 14 and down between roll 14 and cylinder 25and then, generally speaking, on around under cylinder 25, being heldthereto by the tails connecting the bag-sections and by such of grippers26 as have passed roll 14 and not yet been released. As thus consideredthe tube would be fed between the roll and the cylinder and be carriedaround under the cylinder until released therefrom by grippers 26reaching the terminals of cams 27.

During the progress of the tube through they machine as a curvedcross-cut 3 comes in line with the line of contact between the roll andthe cylinder cross-cut blade 23 produces the cross-cuts 4, thus entirelysevering the tube into bag-sections, except as the bag-sections areunited by the tails 5 in the upper ply. As thus far considered the tubewould pass through the machine and be severed into bagsections, exceptas to the connecting-tails 5, the series of bag-sections being carriedby the cylinder until released when grippers 26 reach the terminals ofcams 27; but at the instant cross-cuts at are made and the line of thosecuts is passing the contact-line between the roll and the cylinder thespurs 22 penetrate the prow of the lower ply of the tube and as the rolland cylinder continue to rotate draw the lower ply of the bag-bottom tothe surface of roll 14 and cause the lower ply to accompany theperiphery of roll 14, while the upper ply of the tube accompanies theperiphery of the cylinder, the effect being to drag open the bottom ofthe bag. An early efifect of this opening of the bottom is of course toopen the bellows folds, and as grippers 17 and 26 slightly pass the lineof contact between the roll and the cylinder the bellows folds areopened sufficiently to permit these grippers to properly enter. At thistime the arms 19 of the grippers engage the cams 20 and 27, whereby thefingers of the grippers 17 and 26 are caused to swing inwardly and clampthe two lower plies of the bellows fold to the roll and the two upperplies of the bellows fold to the cylinder, the clamping taking place onthe breaking-lines represented by dotted lines 31 in Fig. 5. Theresultis that as the bottom of the bag continues to be dragged open thebellows folds break on lines 31, thus'producing the diamond fold, as theopening motion produces a flattening of the bag-bottom somewhat at rightangles to the general plane of the tube. As the roll and cylindercontinue to turn the time will soon come when the bagbottom has beenstretched to its utmost by the strain of spurs 22 pulling the trailingfrom roll 14, leaving the bag-bottom still held to the cylinder by thetail which unites the bag-sections and by cylinder-grips 26, which arestill in action. The bag-section, with its diamond fold thus formed, iscarried forward by the cylinder, and the folds of the diamond arepressed by roll 30, thus completing the action of our improvement andleaving the bag-section in condition to receive the bottom paste andhave the flaps folded and pressed by the usual mechanism, which, ifdesired, may operate in conjunction with that portion of cylinder 25beyond press-roll 30, cams 27 being prolonged, so that the cylinderretains its grip upon the bag-sections until the bottom paste has beenapplied, the trailing flap folded and pressed, the tail at the prow-flapsevered from the preceding bag, the prow-flap folded and pressed, andthe bag thus completed severed from the succeeding bagsection and readyfor final discharge.

We should, perhaps, explain that it is preferable that the tube as itenters our machine be provided with the usual creases where the folds ofthe diamonds are to take place, it

being understood that this creasing may be formed as usual and by theusual creasing mechanism.

It has been proposed by numerous inventors to form the diamond fold atthe bottom end of paper-tube sections by means of acylinder operating inconj u nction with a folding-plate, the latter having very complicatedmotions. It has also been proposed by numerous inventors to form thediamond fold by means of a pair of cooperating cylinders carryingvarious forms of folding devices and having more or less complicatedadjuncts and movements but in these latter cases the rolls have had todeal with both flaps of the bottom end of the bag-section, and it thusbecame necessary to feed the bag-section to exact position between thecylinders and then cause both of the flaps of the bag-section to beengaged either by flap-grippers centrally disposed upon the cylinder orby extraneous flapgripping agents. So far as we are apprised of thestate of the art we are the first to subject a paper tube to the actionof a simple pair of cylinders running in contact with each other andhaving a simple continuous forward motion and by means of these simplecylinders and side grippers carried by them form the diamond foldswithout the necessity for the employment of flap-grippers upon bothcylinders or extraneous devices for engaging the grippers carried by thecylinder, and holding said grippers in engagement with the blank untilafter the succeeding pair of grip- 15 pers has engaged the nextblank-section, and

' mechanism for turning said roll and cylinder continuously forward.

JAMES W. DUVALL, GEORGE A. SHEPARD.

the flaps during the operation of the cylinders in forming the diamondfold.

Ve claim as our invention In a paper-bag machine for operating uponconnected blank-sections, the combination of a roll, a pair of sidegrippers carried thereby, a flap-holder carried by said roll; a cylinderrunning in contact with and having a diameter in multiple of that of theroll, a multiplicity of pairs of side grippers carried by said cylinder,means for operating the grippers carried by the roll, means foroperating \Vitnesses:

PITMAN DOTY, B. IIARWITZ.

